Broadband Seismic Characterization of the Arabian Shield
Abstract
Seismograms recorded on broadband instruments in Saudi Arabia for events occurring in the Zagros Folded Belt of Iran often show a P phase with an apparent velocity of about 5.7 km/sec. We refer to this phase as P(x). Its amplitude rapidly diminishes along Arabian Shield paths, suggesting it is a guided wave in the sedimentary section of the Arabian Platform. P(x) blockage is observed for event-station paths crossing the Zagros and for some other events that we believe occur below the wave guide. Both the amplitude variation observed for P(x) and its probable nature as a relatively slow guided wave in the upper crust suggest that the phase has potential for use in focal depth determination by regional stations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1998
- Accession Number
- ADA358578
Entities
People
- Dean M. Childs
- J. E. Zollweg
Organizations
- Boise State University